Apollo PEX barb fittings are a key component of the most economical potable water piping systems.
Poly-Alloy PEX-A Expansion Barb Coupling (10-Pack), 10PK The Apollo Expansion PEX system is a comprehensive cold expansion piping system comprised of brass fittings, poly alloy fittings, manifolds, valves, fasteners, tools and tubing designed for implementation in water delivery systems, simple or complex. 3/4 in.Also capable of integration into hydronic heating systems, Apollo Expansion PEX couplings must be secured into place using a Apollo Expansion PEX sleeve or comparable cold expansion-type sleeve or ring (all sold separately).